Feed-water heater.



V. D. SANDEHS.

FEED WATER HEATER. y APPLICATION FILED MAY 29, I9I5. f 1,180,440.` YPt-endfffxpr. 1915. f

V. D. SANDERS.

FEED WATER HEATER.

APPLxc'ATlAoN FILED MAY 29, |9x5.

1,180,440. Patented Apr. 25,1916.

2 SHEETS-SHEET 2.

STATES PATENT OFFICE.

VERNE D. SANDERS, F TULSA, OKLAHOMA, ASSIGNOB. TO ECONOMY WATER HEATERCOMPANY, OF TULSA, OKLAHOMA, A CORPORATION.

FEED-WATER HEATER.

Specification of Letters Patent.

' Patented Apr. 25, 1916.

Application led May 29, 1915. Serial No. 31,173.

To all/whom t may concern:

Be it known that I, VERNE D. SANDERS,

.a citizen of the United States, residing at Tulsa, in the county ofTulsa and State of Oklahoma, have invented certain new and `usefulimprovements in F eed-l/Vater Heaters, of which the followingl is aspecification. y

This invention relates to certain new and useful improvements in feedwater heaters adapted for use in connection with steam boilers, both ofthe stationary andlocomo-v tive types.

One object of the invention is to provide a. feed water heater includinga heating coil arranged within the Vsmoke box or combus- .tion chamberof the boiler, and through which coil the water passes before it -isintroduced into the boiler, andmeans arranged within the line of feedwhereby the water may be causedto flow from a source of supply to thecoil and from the coil to the boiler; or from the boiler to the coil andthence back to the boiler again, so as to establish a completecirculation to prevent burning .out of the coil in the event of thestoppage of the pump or injector in the feed supply; or whereby, in theevent of dev rangement of the coil and its connections, the water mayzbepumped directly from ,the source of supply l.into the boiler.

` Another object of the invention is to provide a feed water heater ofthe character describedwherein a vnovel construction and arrangement ,ofpipes and valves is employed to secure the desired results and wherebysimplicity in both construction and operation and economy ofinstallation with a material saving in the use of fuel will be effected.With these and other objects in View, the invention consists in thefeatures of construction andY combination and arrangement of parts morefully hereinafter described and claimed, reference being' had to theaccompanying drawing, in which- Figure 1 is a view in side elevation of`a portion of a steam boiler embodying my invention, portions of thewall of the boiler being broken away to more clearly illustrate thearrangement of parts; Figs. 2 and 8 are diagrammatic views illustratingthe several service operations for which the ap paratus is adapted; andFig. 4 is a View similar to F ig. l, showing a modilication.

Referring now more particularly to the drawings, the numeral 1designates conventlonally a portion of a steam boiler provided with theusual fire tubes or liues 3 and the Vsmokel box 4. Located within thesmoke box el 1s a vertical heatei-.coil 5 formed of a compound bank oftubes, the lower or inlet end 6 of the coil being extended to theexterior and connected bythe union 7 to the inlet or cold water supplypipe 8, which leads to the usual injector orpump (not shown) or othersource of force feed supply. The upper or outlet end 9 of the coil alsoextends exterior-ly and is connected by the union 10 with a return orhot water pipe 11 which extends alongside the boiler and is connectedwith the water containing space thereof, as indicated at 12. f

Arranged within the pipe 9 is a check valve 13 and a globe or othercontrolling and cut-ofi' valve 14, said check valve being arranged toopen to freely permit flow of the w'ater from the pump or injector tothe coil. A controlling and cut-oli' valve 15, similar to the valve 111,is also provided in the return pipe 11. A short pipe section 16, which Itei-ma circulation pipe, is con v circulation pipe is a controlling andcut-ofiI valve 18 similar to the valves 14 and 15, and also'located in'said pipe is a check "valve 19, which is adapted to open in a.direction toward the boiler and close in a direction tow'ard the coldwater supply pipe 8. A lby-pass pipe or conductor() is connected at oneend with the pipe 8 at a point between the valves 13 and `14 and isconnected with the delivery end of the pipe 11 at a point between thevalve 1 5 and the boiler. This pipe 20 is provided with a con trollingand cut-oil valve 21 which is similar `in character to the valves 14, 15and 18.

In practice, the coil 5 is arranged within the smoke box substantiallybelow the level of the water in the boiler, so as to insure a propercirculation being obtained. In the normal operation of the device, thefeed lwater from the. pump or injector is supplied through the pipe 8 tothe coil 5, circulates through said coil and is thereby heated andthence passes through the pipe 1l into the water space of the boiler. Inthis operation 4of the device, as will be seen by reference to Fig. 2,the valve 21 is closed and the valves 1l. 15 and 18 are opened, so thatthe `water will pass the check valve 13 and flow along the pipe S intothe coil and thence through the pipe 11 to the boiler, as beforedescribed. It', however, the pump or injector should, stop or the sourceof supply be otherwise cut ott, as when the engine is not in use and thefire is drawn. the valves 14, 15 and 18 may be closed and the valve 21opened, whereupon the 'atei' under pressure from the boiler will passthrough the pipe 16, openiner the check valve 19 in said pipe andclosing the check valve 13 in the pipe 8, and will flow through thedelivery end of the pipe S into the coil and through the pipe 11 hack tothe boiler, the coil heilig thereby filled from the boiler and preventedfrom burning out when the lire is again started in the fire box.Furthermore, by closing the valves 14, l5 and 1S and opening the valve21, as shown iii-Fie'. 3. the How of water through the supply pipe tothe coil will be cut oli', as will also commu nication between the coiland the boiler, and the feed water will flow past the check valve 13 andthrough the by-pass 20 to the delivery end of the pipe 1l between theclosed valve ll and the boiler and into the. latter, enabling a directfeed of the water from the source of supply to the boiler to be carriedout in the event of stoppage of or damage to the coil orvassociatcdparts of the feed water connections beyond the by-pass pipe.

It will be noted that as the coil 5 is disposed wholly or substantiallybelow the water level in the boiler, I not only insure a' propercirculation but obviate any liability of the coil being! burned out fromthe heat of the, smoke box, as the coil will be kept constantly full ofwater in the first two operations set forth, and in the use of thebypass may be protected wholly or to aI large extent unless broken bythe presence of a greater or less quantity of water therein. Inaslnuchas the coil is heated from the heat within the. `fire box, no additionalheating means is required. and as the feed water iS heated prior to itsintrmluction into the 'boiler by what is ordinarily waste heat,` economyin the operation is obviously se, cured. By disconnectinethe unions 7and 10, the coil may be detached from the service pipes and withdrawnthrough the door of the fire box for cleaning, renewal or repairs. By

the novel construction and organization ofr parts disclosed it will beseen that an inem pt lve type of feed water heater is provi ud whichembodies means for maintain a constant feed of water through the coiland supply of hot water to the boiler,l while at the same time enablingrthe course of iiow of the water to be varied for an automaticcirculation through the coil in the event of the derangeinent of thewater supplying means, or of the direct feed of water from the supplyingmeans to the boiler in the event of derangexnent of the coil, thlissecuring safety under all conditions of service.

In the modification shown in Fig. -l the construction is the saine asthat previously described, except that the coil is located in thecombustion chamber 4 instead of in the fire box, which arrangement maysometimes be used.

I claim as my" invention:

In a feed water heater, the combination with a steam boiler having a`heating chamber, ofa heater located within the heating chamber below thelevel of the water in the boiler, a water supply pipe connected with thelower inlet end of the heater, a return pipe leadingr from the upperoutlet end of the heater to the water space of the boiler, cat-offvalves in said pipes, a by-pass pipe connecting said supply and returnpipes at a point in advance of the cut-off valves therein and providedwith a cnt-off valve, a check valve in the water supply pipe in rear ofthe by-pass pipe, and a circulation` pipe connected at its upper endwith lie boiler below the return pipe and at its lower end with thewater supply pipe at a point between the by-pass pipe and the inlet cudof the heater, said circulation pipe being provided with cut-otf andcheck valves, the controlliner valve in the supply pipe being arrangedin the length of said pipe between said bypass and circulation pipes.

In testimony whereof I ailix my signature in presence of two witnesses.

VERNE D, SANINGRS.

Witnesses:

lV. C. lUnninn, FLOYD A. Sannnns.

